无法使用UART接收完整数据

你好，
我使用微控制器CY8C4246LTEDM405。我正在尝试使用USSD从服务器接收命令，并且正在使用SIM868 GSM模块。我的问题是，如果我用两秒的时间差从服务器发送两个数据，我一次只能接收一个数据，而不是另一个，但我需要同时接收两个数据。所以，我实际上是在查询UART数据，逻辑是这样的：
（（c＝uARTHARSIM868，UARTGETHARCH（））
ATCCL收视卡（和；SIM868，C）；
ATCCL接收字符函数看起来像这样：
AccCl收件人（ATCC*T*ATCC，CHARC）
{
如果（ATCC & Gt；AtTyPiPoPs & lt；ATCccBuffelx输入）
ATCC & Gt；Ati输入[ATCC & Gt；AtTyPiPoPs++]＝C；
如果（C＝＝‘n’′& AMP；& ATCC—& Gt；AtTyPiPoPs & lt；＝3）
ATCC & Gt；AtTyPiPoPs＝0；
否则（c＝＝‘n’）
ATCCI输入分析（ATCC）；
}
因此，在上述函数中，数据将以“n”的形式中断。为了接收第二个命令，我首先尝试看看它是否能够接收第二个命令，以便排除它，我实际上提出了一个逻辑：如果接收到两个‘N’，则中断。我添加了这个逻辑代替
否则（c＝＝‘n’）
ATCCI输入PARSE（ATCC）；它能够接收，但由于这个逻辑，我面临的问题是向服务器发送数据。我不知道如何解决这个问题，任何线索都会被感激。
谢谢。



     以下为原文
  Hi,

I am using MicroController CY8C4246LTIDM405. I am trying to receive command from Server using USSD and Sim868 GSM module is being used. My problem is if I am sending two data from Server with a time difference of even 1 second, I am able to receive only one data at a time not the other one but I need to receive both of them.  So, I am actually polling for UART data and the logic is something like this:
while((c = UART_SIM868_UartGetChar()))
                ATCC_receiveChar(&SIM868, c);

The ATCC_receiveChar function looks something like this:
void ATCC_receiveChar(ATCC_t *atcc, char c)
{
if (atcc->AT_inputPos < ATCC_BUFFER_INPUT)
atcc->AT_input[atcc->AT_inputPos++] = c;
if (c == 'n' && atcc->AT_inputPos <= 3)
atcc->AT_inputPos = 0;
else if (c == 'n')
ATCC_inputParse(atcc);
}

So in the above function, the data will break as soon as' n'. To receive the second command, I first of all tried to see if it is even able to receive the second command and so to rule it out, I actually put a logic that if two 'n's are received then break . I  added this logic in place of
else if (c == 'n')
ATCC_inputParse(atcc); and it was able to receive but because of this logic, I am facing problem in sending data to the server. I don't know how to solve this problem and any leads will be appreciated.

Thanks.